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Finding the Fourth Proportional to 579,683.90, 869,120.85 and 342,904.70

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Solution

The fourth proportional to 579,683.90, 869,120.85 and 342,904.70 is: 514,117.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,683.90 : 869,120.85 = 342,904.70 : x
  2. Step 2: Convert to fraction form
    579,683.90/869,120.85 = 342,904.70/x
  3. Step 3: Cross multiply
    579,683.90x = 869,120.85 × 342,904.70
  4. Step 4: Simplify right side
    579,683.90x = 298,025,624,333.00
  5. Step 5: Solve for x
    x = 298,025,624,333.00/579,683.90
  6. Step 6: Final answer
    x = 514,117.48

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.